U.S. patent number 7,997,762 [Application Number 12/406,088] was granted by the patent office on 2011-08-16 for light-guiding modules and led lamp using the same.
This patent grant is currently assigned to Foxconn Technology Co., Ltd., Fu Zhun Precision Industry (Shen Zhen) Co., Ltd.. Invention is credited to Li He, Zhong-Qing Wang.
United States Patent |
7,997,762 |
Wang , et al. |
August 16, 2011 |
Light-guiding modules and LED lamp using the same
Abstract
An LED lamp includes a base, an LED module having a plurality of
LEDs mounted on a top of the base, and a light-guiding module fixed
on the LED module. The light-guiding module includes a plurality of
mounted plates and a plurality of inserted plates intersecting and
engaging the mounted plates. The mounted plates and the inserted
plates cooperatively define a plurality of cavities to receive
corresponding LEDs therein for guiding and reflecting light
generated by the corresponding LED in a predetermined manner.
Inventors: |
Wang; Zhong-Qing (Shenzhen,
CN), He; Li (Shenzhen, CN) |
Assignee: |
Fu Zhun Precision Industry (Shen
Zhen) Co., Ltd. (Shenzhen, Guangdong Province, CN)
Foxconn Technology Co., Ltd. (Tu-Cheng, New Taipei,
TW)
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Family
ID: |
41447166 |
Appl.
No.: |
12/406,088 |
Filed: |
March 17, 2009 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20090323337 A1 |
Dec 31, 2009 |
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Foreign Application Priority Data
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Jun 25, 2008 [CN] |
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2008 1 0068108 |
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Current U.S.
Class: |
362/249.02;
362/292; 362/290; 362/241; 362/237; 362/354; 362/342 |
Current CPC
Class: |
F21V
7/0083 (20130101); F21S 2/005 (20130101); F21V
17/10 (20130101); F21V 7/10 (20130101); F21Y
2103/10 (20160801); F21V 2200/15 (20150115); F21Y
2115/10 (20160801) |
Current International
Class: |
F21V
21/00 (20060101) |
Field of
Search: |
;362/290-293,422,342,325,354,249.02,241,237 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: May; Robert
Attorney, Agent or Firm: Niranjan; Frank R.
Claims
What is claimed is:
1. An LED lamp, comprising a base; an LED module mounted on a top
of the base, the LED module comprising a plurality of LEDs; and a
light-guiding module fixed on the LED module, the light-guiding
module comprising a plurality of mounted plates and a plurality of
inserted plates intersecting and detachably engaging with the
mounted plates, the mounted plates and the inserted plates
cooperatively defining a plurality of cavities receiving a
corresponding LED therein, each of the cavities being encircled by
two neighboring mounted plates and two neighboring inserted plates,
the mounted plates and the inserted plates cooperatively guiding
and reflecting light generated by the corresponding LEDs in a
predetermined manner.
2. The LED lamp as claimed in claim 1, wherein each cavity
comprises an upper opening and a lower opening in communication
with the upper opening, each lower opening aligning with and
directly facing the corresponding LED of the LED module.
3. The LED lamp as claimed in claim 2, wherein the lower opening is
smaller than the upper opening.
4. The LED lamp as claimed in claim 1, wherein each of the mounted
plates defines a plurality of slit sets receiving the inserted
plates therein.
5. The LED lamp as claimed in claim 4, wherein each of the slit
sets comprises a first slit and a second slit, the first and second
slits extending downwardly towards the LEDs from a top edge of each
mounted plate toward each other.
6. The LED lamp as claimed in claim 5, wherein the first slit of
each slit set angles at an acute angle downwardly and rightward
from the top edge.
7. The LED lamp as claimed in claim 5, wherein the second slit of
each slit forms angle larger than that of the first slit downwardly
and leftward from the top edge.
8. The LED lamp as claimed in claim 5, wherein bottom ends of the
first and second slits are defined at a distance from a bottom edge
of each mounted plate.
9. The light-guiding module as claimed in claim 1, wherein each of
the mounted plates and the inserted plates is a single flat
plate.
10. The light-guiding module as claimed in claim 9, wherein each of
the inserted plates crosses each of the mounted plates.
11. A light-guiding module fixed on an LED module to guide and
reflect light emitted by a plurality of LEDs of the LED module,
comprising: a plurality of mounted plates; and a plurality of
inserted plates intersecting and engaging with the mounted plates,
the mounted plates and the inserted plates cooperatively defining a
plurality of cavities each receiving a corresponding LED therein,
each of the cavities being encircled by two neighboring mounted
plates and two neighboring inserted plates, the mounted plates and
the inserted plates cooperatively guiding and reflecting light
generated by the corresponding LED in a predetermined manner, each
of the cavities comprising an upper opening and a lower opening in
communication with the upper opening.
12. The light-guiding module as claimed in claim 11, wherein the
amount of cavities varies with the amount of mounted plates and
inserted plates.
13. The light-guiding module as claimed in claim 11, wherein the
lower opening is smaller than the upper opening.
14. The light-guiding module as claimed in claim 11, wherein each
of the mounted plates defines a plurality of slit sets receiving
the inserted plates therein.
15. The light-guiding module as claimed in claim 14, wherein the
second slit of each slit set angles about 87.degree. downwardly and
leftward from the top edge.
16. The light-guiding module as claimed in claim 14, wherein each
of the slit sets comprises a first slit and a second slit, the
first and second slits extending downwardly from a top edge of each
mounted plate toward each other.
17. The light-guiding module as claimed in claim 14, wherein the
first slit of each slit set angles about 50.degree. downwardly and
rightward from the top edge.
18. The light-guiding module as claimed in claim 11, wherein each
of the inserted plates crosses each of the mounted plates.
19. The light-guiding module as claimed in claim 18, wherein each
of the mounted plates and the inserted plates is a single flat
plate.
Description
BACKGROUND OF THE DISCLOSURE
1. Field of the Disclosure
The disclosure relates to LED (light emitting diode) lamps and,
more particularly, to an LED lamp using light-guiding modules.
2. Description of Related Art
An LED lamp is a type of solid-state lighting that utilizes LEDs as
a source of illumination. LEDs convert electricity to light via
current through a junction region comprising two different
semiconductors, by which electrons and holes coupled at the
junction region generate the light. LED advantages of resistance to
impact and nearly limitless lifetime under specific conditions make
an LED lamp a cost-effective yet high quality replacement for
incandescent and fluorescent lamps.
Known implementations of LED modules in an LED lamp use a plurality
of individual LEDs to generate light reflected by a light-guiding
module to obtain sufficient illumination of suitably wide
distribution. A conventional light-guiding module is integrally
fabricated and suited only for use in the type of LED lamp for
which its use is intended, such that in order to equip a variety of
LED lamps, custom development and manufacture of a wide range of
light-guiding module types are required, representing considerable
cost and material burdens.
What is needed, therefore, is a light-guiding module compatible
with a variety of LED lamp types, thereby overcoming the described
limitations.
BRIEF DESCRIPTION OF THE DRAWINGS
Many aspects of the present embodiments can be better understood
with reference to the following drawings. The components in the
drawings are not necessarily drawn to scale, the emphasis instead
being placed upon clearly illustrating the principles of the
present embodiments. Moreover, in the drawings, like reference
numerals designate corresponding parts throughout the several
views.
FIG. 1 is an isometric, assembled view of an LED lamp in accordance
with an embodiment of the present disclosure.
FIG. 2 is an exploded view of the LED lamp of FIG. 1.
FIG. 3 is a side view of the LED lamp of FIG. 2.
DETAILED DESCRIPTION OF THE DISCLOSURE
Referring to FIGS. 1-2, an LED lamp in accordance with an
embodiment is illustrated. The LED lamp comprises a base 10, an LED
module 20 mounted on the base 10 and a light-guiding module 30
fixed to a top of the LED module 20.
The base 10 is integrally made of a metal with good heat
conductivity such as copper or aluminum to dissipate heat generated
by the LED module 20. The base 10 is rectangular. Alternatively,
the base 10 can extend fins (not shown) from a bottom surface
opposite to the LED module 20.
The LED module 20 comprises four elongated printed circuit boards
21 mounted lengthways on the base 10 and a plurality of spaced LEDs
24 evenly mounted on top sides of the printed circuit boards 21.
The LEDs 24 of each printed circuit board 21 are arranged along a
central axis thereof. The LEDs 24 of all printed circuit boards 21
are distributed on the base 10 in matrix.
The light-guiding module 30 comprises a plurality of lengthways
mounted plates 31 and a plurality of transverse inserted plates 32
engaging the mounted plates 31. Each mounted plate 31 is elongated
and rectangular. The mounted plates 31 are secured and stand on two
long sides of each of the printed circuit boards 21. The mounted
plates 31 extend outwardly at 3-5.degree. relative to a vertical
direction of a top surface of each printed circuit board 21.
Referring also to FIG. 3, each mounted plate 31 has a top edge 34
and a bottom edge 35 opposite to the top edge 34. Each mounted
plate 31 defines a plurality of slit sets 310. Each slit set 310
includes a straight first slit 311 and a straight second slit 312.
The first and second slits 311, 312 extend through the top edge 34
of each mounted plate 31 and are defined at a distance from the
bottom edge 35 thereof. The first slits 311 of the slit sets 310
are parallel, and the second slits 312 of the slit sets 310 are
parallel. The first and second slits 311, 312 extend downwardly
from the top edge 34 toward each other. The first slit 311 of each
slit set 310 angles about 50.degree. downwardly and rightward from
the top edge 34, and the second slit 312 of each slit set 310
angles about 87.degree. downwardly and leftward from the top edge
34. Thus, a distance between top ends of the first slit 311 and the
second slit 312 of each slit set 310 exceeds that between bottom
ends thereof. In other words, each slit set 310 has an upper
portion in an approximately "V" shape. Alternatively, the angle
between the second slit 312 and the top edge 34 can be defined as
the same as that between the first slit 311 and the top edge
34.
The inserted plates 32 are divided into a plurality of first
inserted plates 321 and a plurality of second inserted plates 322.
Each first inserted plate 321 intersects all of the mounted plates
31. Each of the second inserted plates 322 intersects all of the
mounted plates 31. The first and second inserted plates 321, 322
are intimately received in the corresponding first and second slits
311, 312 of the mounted plates 31, respectively. After assembly of
the light-guiding module 30, the mounted plates 31 and inserted
plates 32 cooperatively define a plurality of receiving cavities 38
corresponding to the LEDs 24. Each of the cavities 38 is encircled
by two neighboring mounted plates 31, a first inserted plate 321
and a second inserted plate 322. Each cavity 38 receives a
corresponding LED 24 therein reflecting and guiding light generated
by the LED 24. Thus, an inner surface of the cavities 38 acts as a
reflecting surface to reflect and guide light generated by the LEDs
24.
Each cavity 38 has a rectangular upper opening (not labeled) and a
rectangular lower opening. Since the first and second inserted
plates 321, 322 received in the first and second slits 311, 312 of
the mounted plates 31 angle upwardly, the lower opening is smaller
than the upper opening. The lower openings of the cavities 38 are
in alignment and directly face corresponding LEDs 24 of the LED
module 20. The amount of cavities 38 of the light-guiding module 30
is determined by the amount of mounted plates 31 and inserted
plates 32 and lengths thereof. To satisfy a requirement for a
variety of LED modules 20 of the LED lamp, the amount of the
mounted plates 31 and the inserted plates 32 and lengths thereof
can be adjusted to define an amount of cavities 38 corresponding to
the LEDs 24 to reflect light generated by the LEDs 24.
According to the disclosure, the mounted plates 31 and the inserted
plates 32 form the light-guiding module 30, allowing the LED module
20 of the disclosed embodiment to conform to varying types of LED
modules in different LED lamps. Furthermore, manufacture of the
light-guiding module 30 requires only simple materials, avoiding
the expense of mold casting, thereby significantly reducing
manufacturing costs of the lamp.
It is believed that the present embodiments and their advantages
will be understood from the foregoing description, and it will be
apparent that various changes may be made thereto without departing
from the spirit and scope of the disclosure or sacrificing all of
its material advantages, the examples hereinbefore described merely
being preferred or exemplary embodiments of the disclosure.
* * * * *